I don't think so, but I also don't think that it's going to be popular opinion around foss/computer people MS Office software is used around shittton of workpl

I don't think so, but I also don't think that it's going to be popular opinion around foss/computer people MS Office software is used around shittton of workplaces and from time to time in day-to-day life, so making people somewhat proficent at it is good for everybody except MS competitors. I'm not sure what do you mean by teaching "UI" - they teach how to get things done with given software.